There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

Can you solve the below tricky visual equation?

Find the next number in the sequence

1, 2, 6, 21, 88, __?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

Our product and our sum always give the same answer. Who are we?

Which Travels Faster? Solve below famous picture riddle:

How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

I left my campsite and hiked south for 3 miles. Then I turned east and hiked for 3 miles. I then turned north and hiked for 3 miles, at which time I came upon a bear inside my tent eating my food! What colour was the bear?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?